I got tired of waiting for the 6112's so I pulled the trigger on Fox coilovers. They're spendy at $430 a pop but the ride is fantastic. I went with Cognito ball joint UCA's, Fox Shox premier coilovers and difff drop spacers. As far as leveling It cost more than a spacer kit but it's doing it right with added travel and a better ride. They come set at 2" lift from Fox. By the way, on my 2015 Sierra half ton I put 275/70-R18 Goodrich TA KO2 tires (33"x10.8") on the factory wheels before doing the lift and they fit without any rubbing at stock height.